55781696 has 14 divisors (see below), whose sum is σ = 110691930. Its totient is φ = 27890816.

The previous prime is 55781683. The next prime is 55781711. The reversal of 55781696 is 69618755.

It can be written as a sum of positive squares in only one way, i.e., 36772096 + 19009600 = 6064^2 + 4360^2 .

It is a super-2 number, since 2×55781696² = 6223195217272832, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55781696.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435731 + ... + 435858.

Almost surely, 2^55781696 is an apocalyptic number.

It is an amenable number.

55781696 is a deficient number, since it is larger than the sum of its proper divisors (54910234).

55781696 is an equidigital number, since it uses as much as digits as its factorization.

55781696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 871601 (or 871591 counting only the distinct ones).

The product of its digits is 453600, while the sum is 47.

The square root of 55781696 is about 7468.7144810871. The cubic root of 55781696 is about 382.0884456625.

The spelling of 55781696 in words is "fifty-five million, seven hundred eighty-one thousand, six hundred ninety-six".